//////////////////////////////////////////////////////////////////////////////////
//本程序只供学习使用，未经作者许可，不得用于其它任何用途
//中景园电子
//店铺地址：http://shop73023976.taobao.com/?spm=2013.1.0.0.M4PqC2
//
//  文 件 名   : main.c
//  版 本 号   : v2.0
//  作    者   : HuangKai
//  生成日期   : 2014-0101
//  最近修改   :
//  功能描述   : OLED 4接口演示例程(51系列)
//              说明:
//              ----------------------------------------------------------------
//              GND    电源地
//              VCC  接5V或3.3v电源
//              D0   接PA5（SCL）
//              D1   接PA7（SDA）
//              RES  接PB0
//              DC   接PB1
//              CS   接PA4
//              ----------------------------------------------------------------
// 修改历史   :
// 日    期   :
// 作    者   : HuangKai
// 修改内容   : 创建文件
//版权所有，盗版必究。
//Copyright(C) 中景园电子2014/3/16
//All rights reserved
//******************************************************************************/

#include "oled.h"
#include "stdlib.h"
#include "oledfont.h"
#include "delay.h"
#include "stm32f10x.h"
//OLED的显存
//存放格式如下.
//[0]0 1 2 3 ... 127
//[1]0 1 2 3 ... 127
//[2]0 1 2 3 ... 127
//[3]0 1 2 3 ... 127
//[4]0 1 2 3 ... 127
//[5]0 1 2 3 ... 127
//[6]0 1 2 3 ... 127
//[7]0 1 2 3 ... 127

#if OLED_MODE == 1
//向SSD1106写入一个字节。
//dat:要写入的数据/命令
//cmd:数据/命令标志 0,表示命令;1,表示数据;
void OLED_WR_Byte(uint8_t dat, uint8_t cmd)
{
	DATAOUT(dat);
	if (cmd)
		OLED_DC_Set();
	else
		OLED_DC_Clr();
	OLED_CS_Clr();
	OLED_WR_Clr();
	OLED_WR_Set();
	OLED_CS_Set();
	OLED_DC_Set();
}
#else
//向SSD1106写入一个字节。
//dat:要写入的数据/命令
//cmd:数据/命令标志 0,表示命令;1,表示数据;
void OLED_WR_Byte(uint8_t dat, uint8_t cmd)
{
	uint8_t i;
	if (cmd)
		OLED_DC_Set();
	else
		OLED_DC_Clr();
	OLED_CS_Clr();
	for (i = 0; i < 8; i++)
	{
		OLED_SCLK_Clr();
		if (dat & 0x80)
			OLED_SDIN_Set();
		else
			OLED_SDIN_Clr();
		OLED_SCLK_Set();
		dat <<= 1;
	}
	OLED_CS_Set();
	OLED_DC_Set();
}
#endif
void OLED_Set_Pos(unsigned char x, unsigned char y)
{
	OLED_WR_Byte(0xb0 + y, OLED_CMD);
	OLED_WR_Byte(((x & 0xf0) >> 4) | 0x10, OLED_CMD);
	OLED_WR_Byte((x & 0x0f) | 0x01, OLED_CMD);
}

void OLED_PutPixel(uint8_t x, uint8_t y)
{
	uint8_t data1; //data1当前点的数据

	OLED_Set_Pos(x, y);
	data1 = 0x01 << (y % 8);
	OLED_WR_Byte(0xb0 + (y >> 3), OLED_CMD);
	OLED_WR_Byte(((x & 0xf0) >> 4) | 0x10, OLED_CMD);
	OLED_WR_Byte((x & 0x0f) | 0x00, OLED_CMD);
	OLED_WR_Byte(data1, OLED_DATA);
}

void OLED_ClrPixel(uint8_t x, uint8_t y)
{
	uint8_t data1; //data1当前点的数据

	OLED_Set_Pos(x, y);
	data1 = 0x00 << (y % 8);
	OLED_WR_Byte(0xb0 + (y >> 3), OLED_CMD);
	OLED_WR_Byte(((x & 0xf0) >> 4) | 0x10, OLED_CMD);
	OLED_WR_Byte((x & 0x0f) | 0x00, OLED_CMD);
	OLED_WR_Byte(data1, OLED_DATA);
}

void OLED_SetPixel(uint8_t x, uint8_t y, uint8_t dat)
{
	if (dat)
		OLED_PutPixel(x, y);
	else
		OLED_ClrPixel(x, y);
}

//开启OLED显示
void OLED_Display_On(void)
{
	OLED_WR_Byte(0X8D, OLED_CMD); //SET DCDC命令
	OLED_WR_Byte(0X14, OLED_CMD); //DCDC ON
	OLED_WR_Byte(0XAF, OLED_CMD); //DISPLAY ON
}
//关闭OLED显示
void OLED_Display_Off(void)
{
	OLED_WR_Byte(0X8D, OLED_CMD); //SET DCDC命令
	OLED_WR_Byte(0X10, OLED_CMD); //DCDC OFF
	OLED_WR_Byte(0XAE, OLED_CMD); //DISPLAY OFF
}
//清屏函数,清完屏,整个屏幕是黑色的!和没点亮一样!!!
void OLED_Clear(void)
{
	uint8_t i, n;
	for (i = 0; i < 8; i++)
	{
		OLED_WR_Byte(0xb0 + i, OLED_CMD); //设置页地址（0~7）
		OLED_WR_Byte(0x00, OLED_CMD);	 //设置显示位置—列低地址
		OLED_WR_Byte(0x10, OLED_CMD);	 //设置显示位置—列高地址
		for (n = 0; n < 128; n++)
			OLED_WR_Byte(0, OLED_DATA);
	} //更新显示
}

//在指定位置显示一个字符,包括部分字符
//x:0~127
//y:0~63
//mode:0,反白显示;1,正常显示
//size:选择字体 16/12
void OLED_ShowChar(uint8_t x, uint8_t y, uint8_t chr)
{
	unsigned char c = 0, i = 0;
	c = chr - ' '; //得到偏移后的值
	if (x > Max_Column - 1)
	{
		x = 0;
		y = y + 2;
	}
	if (SIZE == 16)
	{
		OLED_Set_Pos(x, y);
		for (i = 0; i < 8; i++)
			OLED_WR_Byte(F8X16[c * 16 + i], OLED_DATA);
		OLED_Set_Pos(x, y + 1);
		for (i = 0; i < 8; i++)
			OLED_WR_Byte(F8X16[c * 16 + i + 8], OLED_DATA);
	}
	else
	{
		OLED_Set_Pos(x, y + 1);
		for (i = 0; i < 6; i++)
			OLED_WR_Byte(F6x8[c][i], OLED_DATA);
	}
}
//m^n函数
uint32_t oled_pow(uint8_t m, uint8_t n)
{
	uint32_t result = 1;
	while (n--)
		result *= m;
	return result;
}
//显示2个数字
//x,y :起点坐标
//len :数字的位数
//size:字体大小
//mode:模式	0,填充模式;1,叠加模式
//num:数值(0~4294967295);
void OLED_ShowNum(uint8_t x, uint8_t y, uint32_t num, uint8_t len, uint8_t size)
{
	uint8_t t, temp;
	uint8_t enshow = 0;
	for (t = 0; t < len; t++)
	{
		temp = (num / oled_pow(10, len - t - 1)) % 10;
		if (enshow == 0 && t < (len - 1))
		{
			if (temp == 0)
			{
				OLED_ShowChar(x + (size / 2) * t, y, ' ');
				continue;
			}
			else
				enshow = 1;
		}
		OLED_ShowChar(x + (size / 2) * t, y, temp + '0');
	}
}
//显示一个字符号串
void OLED_ShowString(uint8_t x, uint8_t y, uint8_t *chr)
{
	unsigned char j = 0;
	while (chr[j] != '\0')
	{
		OLED_ShowChar(x, y, chr[j]);
		x += 8;
		if (x > 120)
		{
			x = 0;
			y += 2;
		}
		j++;
	}
}
//显示汉字
void OLED_ShowCHinese(uint8_t x, uint8_t y, uint8_t no)
{
	uint8_t t, adder = 0;
	OLED_Set_Pos(x, y);
	for (t = 0; t < 16; t++)
	{
		OLED_WR_Byte(Hzk[2 * no][t], OLED_DATA);
		adder += 1;
	}
	OLED_Set_Pos(x, y + 1);
	for (t = 0; t < 16; t++)
	{
		OLED_WR_Byte(Hzk[2 * no + 1][t], OLED_DATA);
		adder += 1;
	}
}
/***********功能描述：显示显示BMP图片128×64起始点坐标(x,y),x的范围0～127，y为页的范围0～7*****************/
void OLED_DrawBMP(unsigned char x0, unsigned char y0, unsigned char x1, unsigned char y1, unsigned char BMP[])
{
	unsigned int j = 0;
	unsigned char x, y;

	if (y1 % 8 == 0)
		y = y1 / 8;
	else
		y = y1 / 8 + 1;
	for (y = y0; y < y1; y++)
	{
		OLED_Set_Pos(x0, y);
		for (x = x0; x < x1; x++)
		{
			OLED_WR_Byte(BMP[j++], OLED_DATA);
		}
	}
}

//初始化SSD1306
void OLED_Init(void)
{

	GPIO_InitTypeDef GPIO_InitStructure;

	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); //使能A端口时钟
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;  //推挽输出
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //速度50MHz
	GPIO_Init(GPIOA, &GPIO_InitStructure);			  //初始化GPIOD3,6
	GPIO_SetBits(GPIOA, GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7);

	OLED_RST_Set();
	delay_ms(100);
	OLED_RST_Clr();
	delay_ms(200);
	OLED_RST_Set();

	OLED_WR_Byte(0xAE, OLED_CMD); //--turn off oled panel
	OLED_WR_Byte(0x00, OLED_CMD); //---set low column address
	OLED_WR_Byte(0x10, OLED_CMD); //---set high column address
	OLED_WR_Byte(0x40, OLED_CMD); //--set start line address  Set Mapping RAM Display Start Line (0x00~0x3F)
	OLED_WR_Byte(0x81, OLED_CMD); //--set contrast control register
	OLED_WR_Byte(0xCF, OLED_CMD); // Set SEG Output Current Brightness
	OLED_WR_Byte(0xA1, OLED_CMD); //--Set SEG/Column Mapping     0xa0左右反置 0xa1正常
	OLED_WR_Byte(0xC8, OLED_CMD); //Set COM/Row Scan Direction   0xc0上下反置 0xc8正常
	OLED_WR_Byte(0xA6, OLED_CMD); //--set normal display
	OLED_WR_Byte(0xA8, OLED_CMD); //--set multiplex ratio(1 to 64)
	OLED_WR_Byte(0x3f, OLED_CMD); //--1/64 duty
	OLED_WR_Byte(0xD3, OLED_CMD); //-set display offset	Shift Mapping RAM Counter (0x00~0x3F)
	OLED_WR_Byte(0x00, OLED_CMD); //-not offset
	OLED_WR_Byte(0xd5, OLED_CMD); //--set display clock divide ratio/oscillator frequency
	OLED_WR_Byte(0x80, OLED_CMD); //--set divide ratio, Set Clock as 100 Frames/Sec
	OLED_WR_Byte(0xD9, OLED_CMD); //--set pre-charge period
	OLED_WR_Byte(0xF1, OLED_CMD); //Set Pre-Charge as 15 Clocks & Discharge as 1 Clock
	OLED_WR_Byte(0xDA, OLED_CMD); //--set com pins hardware configuration
	OLED_WR_Byte(0x12, OLED_CMD);
	OLED_WR_Byte(0xDB, OLED_CMD); //--set vcomh
	OLED_WR_Byte(0x40, OLED_CMD); //Set VCOM Deselect Level
	OLED_WR_Byte(0x20, OLED_CMD); //-Set Page Addressing Mode (0x00/0x01/0x02)
	OLED_WR_Byte(0x02, OLED_CMD); //
	OLED_WR_Byte(0x8D, OLED_CMD); //--set Charge Pump enable/disable
	OLED_WR_Byte(0x14, OLED_CMD); //--set(0x10) disable
	OLED_WR_Byte(0xA4, OLED_CMD); // Disable Entire Display On (0xa4/0xa5)
	OLED_WR_Byte(0xA6, OLED_CMD); // Disable Inverse Display On (0xa6/a7)
	OLED_WR_Byte(0xAF, OLED_CMD); //--turn on oled panel

	OLED_WR_Byte(0xAF, OLED_CMD); /*display ON*/
	OLED_Clear();
	OLED_Set_Pos(0, 0);
}
